Expandable fastener for hollow walls, cement blocks or the like



FIG. 1 is an isometric view of an expandable fastener for hollow walls, cement blocks or the like showing my new design;

FIG. 2 is a side view;

FIG. 3 is another side view;

FIG. 4 is a right end view thereof;

FIG. 5 is a left end view thereof. 

The ornamental design for an expandable fastener for hollow walls, cement blocks or the like, as shown and described. 